Remedial MTK WAJIB
REMEDIAL PTS SEMESTER GENAP
MATEMATIKA WAJIB.
NAMA : NUR FITRI ZAHRA
KELAS : X MIPA 3
ABSEN : 26
Remedia PTS mtkw
Nur Fitri Zahra 26 X MIPA 3 1. |2x-7| = 3 2x -7 = 3 2x = 3 + 7 = 10 x = 10/2 = 5 -2x + 7 = 3 -2x = 3 - 7 = -4 2x = 4 x = 4/2 = 2 Hp = {2, 5} 2. |2x - 1| = |x + 4| |2x - 1| ² = |x + 4|² (2x - 1)² = (x + 4)² (2x - 1)² - (x + 4)² = 0 [(2x - 1 - x - 4)(2x - 1 + x + 4)] = 0 (x - 5)(3x + 3) = 0 x - 5 = 0 atau 3x + 3 = 0 x = 5 atau x = -1 Hp = {-1, 5} 4. 2|- 2x - 2| - 3 = 13 2|- 2x - 2| = 16 |- 2x - 2| = 8 - 2x - 2 = 8 - 2x = 10 x = - 5 - 2x - 2 = - 8 - 2x = - 6 x = 3 Hp = {3, -5} 5. |4x + 2| ≥ 6 Untuk x > 0 4x + 2 ≥ 6 4x ≥ 6 - 2 4x ≥ 4 x ≥ 4/4 x ≥ 1 Untuk x < 0 4x + 2 ≤ -6 4x ≤ -6 - 2 4x ≤ -8 x ≤ -8/4 x ≤ -2 HP = {x | x ≤ -2 atau x ≥ 1} 6. Misal : |3x+2|= p maka |3x +2|² + |3x + 2|-2=0 p²+p-2=0 (p+2)(p-1) = 0 p+2=0 p=-2 Atau p-1=0 p=1 |3x +2|=1 =3x + 2 = 1 3x=1-2 3x = -1o x = -1/3 -(3x + 2) = 1 3x + 2 = -1 3x = -1-2 3x = -3 x = -1 Hp {-1, -1/3} 8. a^2 + 2a - 3 (a + 3) (a - 1) = 0 a = -3 atau a = 1 x-1 =1 x =1 atau -x + 1 =...
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